Steps in calibration of Endcap with MIP's using UxV
Updated September, 2005

1. the code: cvs co StRoot/StEEmcPool/StEzSmdCal/ cons

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   STEP 1 : no calib is avaliable,
   Goal: produce relative SMD gains
2. root4star -b -q rdEztMuSmdCal.C
   Disable all masks, calibration is irrelevant, need enough events to have reasonable slopes in SMD, 700K CuCu minB events was enough. Make sure you do not cut on pre/post/smd energy - does not exist.
   LSF: bigSort.sh
3. Fit SMD slopes
   Use: doSmdGains.C to fit 'expo' to just one plain, set internal switch to do that.
   Use :bigSectloop.sh to loop over plains.
   Pick absolute normalization scale to get abs gains close to 1.

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   STEP 2a : rel SMD calib is avaliable,
   Goal: Determine corrections for absolute SMD gains.
   Re-play all events with SMD gains from slopes. Now you need all events you can afford.
   to find corrections (smooth function vs. strip ID) for all 24 SMD plains use: doSmdGains.C again, butch change internal switch to sum,average, and fit sums of SMD pairs.
4. Apply gain corrections to SMD slopes, use: reCalSmd.C
5. Display UxV points distribution: plSmdCal.C, plPresMap.C ?

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   STEP 2b : rel SMD calib is avaliable,
   Goal: Determine absolute pre/post/tower calibration
6. Fit pre/post spectra with gauss(ped)+Landau(MIP). Use: fitPrePost.C . You need to play with fit params. Note, automatic Web-page with plots and some QA is generated in WWW/tmp area.
7. Fit tower spectra with gauss&Landau(MIP). Use: fitTower.C . Ped resudua are subtracted. You need to play with fit params. Note, automatic Web-page with plots and some QA is generated in WWW/tmp area.
8. Display tower spectra vs. eta bin: plTwCal.C

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   STEP 3 : ~all is absolutely calibrated
   Goal: slopes needs to be used for some tiles
9. run script: fitSlope5.C , called by: fixGainUsingSlope.tcl to do relative calibration based on slopes of neighbours at the same eta bin.